https://greyhive.com/videos/watch/e1dedd06-171b-4c13-8855-89a400ddade1 CMMG Mk57 Banshee test fire with Promag 55rd drum & H2 buffer. H3 buffer should fix the ejection issue by slowing the bolt down some. Next test will be ran with Speer 40gr HP and the Geissele H3 buffer and braided spring rather than H2 buffer and braided spring. H2 is what I am running in my Geissele MOD1 Super Duty 11.5”. Tue, 03 Nov 2026 15:15:22 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://greyhive.com https://greyhive.com/lazy-static/avatars/5746210d-885d-44b2-9be0-92bf1e4d34df.webp https://greyhive.com/videos/watch/e1dedd06-171b-4c13-8855-89a400ddade1 All rights reserved, unless otherwise specified in the terms specified at https://greyhive.com/about and potential licenses granted by each content's rightholder.